Macbook Boot Error, Completely Stumped

Hey everyone,
So lately my macbook that I got in the summer of 08 has been acting pretty funky. It would act abnormally slow and crash freeze up when I had firefox open and tried to run other programs. I didn't think anything of it at the time until I tried rebooting yesterday and it didn't work. I recieved a picture of a circle with a line through it.
I then ran my OS X disc in the machine to bring it to disc utility to see what was going on, mind you I left my snow leopard disc at college. All my data and information seemed to be there, so I was trying to transfer everything over to an external device for storage. This never worked because I recieved an "input/output" error while restoring using Disc Utility.
Hours later I discovered the Hardware test option at startup, so I quickly ran that to realize a error message that stated "4MEM/4/4000000000" (give or take a few zeros) while researching this error, I realized that many other cases with similar errors had promblems with RAM and it was easily fixed by sreseating the RAM and flip flopping it around to different slots.
This morning when I tried to reseat and flip flop the RAM, I recieved the Circle and Line error again, and now it wont even bring up the Hardware Check at startup. I've run into a complete wall here, any suggestions or help would be musch appreciated.
Thanks

You have bad RAM or defective sockets. Either replace the RAM or take the computer in for repair to have the motherboard tested. Replacing RAM will not fix the problem if it's a problem with the motherboard or RAM sockets.

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Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact
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